package client;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

import java.net.InetSocketAddress;

public class EchoClient {
    private final String host;
    private final int port;
    public EchoClient(String host,int port){
        this.host=host;
        this.port=port;
    }

    public static void main(String[] args) throws Exception {
        new EchoClient("localhost",8080).start();
    }
    public void start() throws Exception{
        EventLoopGroup group=new NioEventLoopGroup();
        try{
            Bootstrap bootstrap=new Bootstrap();
            bootstrap.group(group).channel(NioSocketChannel.class).remoteAddress(new InetSocketAddress(host,port))
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast(new EchoClientHandler());
                        }
                    });

            ChannelFuture f=bootstrap.connect().sync();
            f.channel().closeFuture().sync();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            group.shutdownGracefully().sync();
        }

    }
}
